package cn.edu.xmu.wnw.dao.impl;

import java.util.List;

import org.hibernate.LockMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import cn.edu.xmu.wnw.dao.CommunityDAO;
import cn.edu.xmu.wnw.pojo.Community;

/**
 * A data access object (DAO) providing persistence and search support for
 * Community entities. Transaction control of the save(), update() and delete()
 * operations can directly support Spring container-managed transactions or they
 * can be augmented to handle user-managed Spring transactions. Each of these
 * methods provides additional information for how to configure it for the
 * desired type of transaction control.
 * 
 * @see cn.edu.xmu.wnw.pojo.Community
 * @author MyEclipse Persistence Tools
 */

public class CommunityDAOImpl extends HibernateDaoSupport implements
		CommunityDAO
{
	private static final Logger log = LoggerFactory
			.getLogger(CommunityDAOImpl.class);
	// property constants
	public static final String NAME = "name";
	public static final String DESCRIPTION = "description";

	public void initDao()
	{
		// do nothing
	}

	public void save(Community transientInstance)
	{
		log.debug("saving Community instance");
		try
		{
			getHibernateTemplate().save(transientInstance);
			log.debug("save successful");
		}
		catch (RuntimeException re)
		{
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(Community persistentInstance)
	{
		log.debug("deleting Community instance");
		try
		{
			getHibernateTemplate().delete(persistentInstance);
			log.debug("delete successful");
		}
		catch (RuntimeException re)
		{
			log.error("delete failed", re);
			throw re;
		}
	}

	public Community findById(java.lang.Integer id)
	{
		log.debug("getting Community instance with id: " + id);
		try
		{
			Community instance = (Community) getHibernateTemplate().get(
					"cn.edu.xmu.wnw.pojo.Community", id);
			return instance;
		}
		catch (RuntimeException re)
		{
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Community instance)
	{
		log.debug("finding Community instance by example");
		try
		{
			List results = getHibernateTemplate().findByExample(instance);
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		}
		catch (RuntimeException re)
		{
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value)
	{
		log.debug("finding Community instance with property: " + propertyName
				+ ", value: " + value);
		try
		{
			String queryString = "from Community as model where model."
					+ propertyName + "= ?";
			return getHibernateTemplate().find(queryString, value);
		}
		catch (RuntimeException re)
		{
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByName(Object name)
	{
		return findByProperty(NAME, name);
	}

	public List findByDescription(Object description)
	{
		return findByProperty(DESCRIPTION, description);
	}

	public List findAll()
	{
		log.debug("finding all Community instances");
		try
		{
			String queryString = "from Community";
			return getHibernateTemplate().find(queryString);
		}
		catch (RuntimeException re)
		{
			log.error("find all failed", re);
			throw re;
		}
	}

	public Community merge(Community detachedInstance)
	{
		log.debug("merging Community instance");
		try
		{
			Community result = (Community) getHibernateTemplate().merge(
					detachedInstance);
			log.debug("merge successful");
			return result;
		}
		catch (RuntimeException re)
		{
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(Community instance)
	{
		log.debug("attaching dirty Community instance");
		try
		{
			getHibernateTemplate().saveOrUpdate(instance);
			log.debug("attach successful");
		}
		catch (RuntimeException re)
		{
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(Community instance)
	{
		log.debug("attaching clean Community instance");
		try
		{
			getHibernateTemplate().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		}
		catch (RuntimeException re)
		{
			log.error("attach failed", re);
			throw re;
		}
	}

	public CommunityDAOImpl getFromApplicationContext(ApplicationContext ctx)
	{
		return (CommunityDAOImpl) ctx.getBean("CommunityDAO");
	}
}